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    <title>Document</title>
    <style>
        .clearfix::after {
            content: '';
            display: block;
            height: 0;
            clear: both;
            visibility: hidden;
        }
        /* 提高兼容性 */
        
        .clearfix {
            *zoom: 1;
        }
    </style>
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<body>

</body>

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